code: def test_antonyms(self):
      # Test antonyms.
      self.assertEqual(
          L("leader.n.1.leader").antonyms(),
          [L("follower.n.01.follower")],
      )
      self.assertEqual(
          L("increase.v.1.increase").antonyms(),
          [L("decrease.v.01.decrease")],
      )
  
file_path: nltk/nltk/test/unit/test_wordnet.py
imports: import unittest
  from nltk.corpus import wordnet
  from nltk.corpus import wordnet_ic
label_desc: Use image node_id 6 for calling the WordnNetDemo obj's underlying member method code with example usage: obj.test_antonyms() without return types